None; didn't get dx'd till last year.
As I look back, there wouldn't have been a need for intervention.
But my NT sister believes there should've been had I been dx'd back then, as far as learning how to make friends and value socializing.
But you can't "teach" someone how to value and be intuitive about socializing and connecting with people. Sure, I can learn from a book how to greet people, what to say when they say certain things, and other mechanical formalities. But I'd be like a machine in pretend-mode. It wouldn't feel intuitive or joyful.
You also can't unteach odd. I was an odd kid, not dramatically odd, but odd enough that classmates knew I was the weirdest or one of the weirdest. I've felt that way since grade school. I had no behavior problems or weird walking, no melts or shuts, so I guess I'm the classic case of "subtle signs" of autism. I'm bland, not spicy.